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Abstract. In the present study, a novel process for effective recoveries of Te and Cu from copper telluride from anode slime processing in copper smelters was …
A simultaneous leaching process to extract both bismuth and manganese by one-step leaching in hydrochloric acid solution is proposed in this paper. Thermodynamic investigations of the E h –pH diagram of both Mn–H 2 O and Bi–S–Cl–H 2 O systems showed that the equilibrium potentials of MnO 2 /Mn 2 + couple were much higher than …
leachate in the ore leaching process are required. There is also a study that Cu is adsorbed on the surface of gangue minerals such as smectites and mordenite with high CEC (Cation Exchange Capacity), reducing the amount of extraction [21]. The present study investigated the leaching behavior of Cu from its oxide ore through-
The process involves leaching of tellurium ores in sulfuric acid with FeCl 3 additive for the recovery of tellurium and bismuth. Another attempt aims to clarify the …
As an alternative, hydrometallurgy has been developed to extract bismuth through selective leaching by using sulfuric acid (H 2 SO 4 ) (Ficeriová et al., 2012;Yang et al., 2009) and hydrochloric ...
Bismuth can substitute for Pb in galena and Bi-rich galena is a major Bi ore. Bismuth alloys with gold to form maldonite at temperatures <373 °C, thereby acting as a Au collector in felsic melts ...
The leaching residue was tested and compared according to the industry standard of metallurgical chromium ore (YB/T 5277-2005) ... rate of copper and silver in the hydrochloric acid system depending on oxidation ability of iron ions and improve the leaching rate of bismuth by increasing the concentration of chloride ion. References. …
Bioleaching kinetics. Comparison of Li bioleaching by three various types of organisms (Fig. 1) revealed that the leaching kinetics in systems with yeast R. mucilaginosa was the fastest. Presence ...
in flotation, leaching and/or recovery processes. Electrum with a high silver content may give poor gold extraction due to tarnishing of the silver (Fleming, 1998). The presence of copper in the ore at above ±0.3% concentration may make direct cyanidation uneconomic without re-treating the Cu(CN)2 formed in leaching, through processes such as
In the smelting experiments, the bismuth concentration was maintained at 200 g and the amount of mixed salt and coal powder added were expressed as multiples and percentages of the ore content. The amount of Fe 2 O 3 required to convert the sulfur released from bismuth concentrate to the form of FeS was calculated based on stoichiometry.
ores can be recovered by whole-ore cyanidation or some combination of fl otation and cyanidation. Acceptable extraction of refractory gold can only be achieved by employing a pre-oxidation process prior to cyanide leaching. …
A simple and efficient method was proposed to selectively separate and recover tellurium and bismuth in an acidic leaching solution of tellurium−bismuth ore by Na 2 SO 3 and Fe powder. Then, the selective reduction mechanism was investigated by SEM−EDS, XRD, XPS, ICP-OES, etc. 99.83% Te in leaching solution can be reduced …
oxidative leaching process was applied to leach bismuth. telluride ore and the leaching rate of tellurium and bismuth. could reach 95.61 and 95.77% (Shao et al., 2020). A large number
Ammonium thiosulfate is an alternative lixiviant for the hydrometallurgical treatment of sulfide gold ores. The present study is primarily focused on ammonium thiosulfate leaching of gold (Au) and silver (Ag) from the sulfide ore (Sunshin mine in Korea). The main chemical composition of the concentrate was Au (84 ppm), Ag (852 …
0.98% of bismuth, the leaching of a copper–bismuth. ... Bismuth can substitute for Pb in galena and Bi-rich galena is a major Bi ore. Bismuth alloys with gold to form maldonite at temperatures ...
In order to recover the tellurium and bismuth resources within the Dashuigou tellurium deposit in Sichuan province, China, the leaching of these metals from the raw ore in H 2 SO 4 and FeCl 3 media was investigated in this work. The effect of H 2 SO 4 concentration, Fe 3+ concentration, liquid/solid ratio, leaching time and leaching …
oxidative leaching which show that the dissolution of tungsten with a high extraction can be reached. According to the main metal characters in the bismuth sulfide concentrate, a process of pressure leaching in alkaline solution was examined in this work. The research focuses on the effects of liquid-to-solid
Because bismuth is recovered as a byproduct of lead and copper ore production, mining wastes are addressed in the descriptions of the initial ore/mineral. ... The extraction methods used to recover bismuth (e.g., leaching, electrolysis) generate wastes including waste caustic sodas, electroly tic slimes, and waste acids. In addition, the ...
These concentrate blends were added to the laterite ore at about 23.0% of the total solids to provide the acid required for the leaching of the concentrate and the laterite ore. The slurry solids content during leaching was adjusted equivalent to 34.1 to 36.0% solids to simulate the solid content expected in a commercial autoclave.
The Objective of the Study is to characterize the process of heap leaching of the technogenic mineral granules obtained from different types of mining waste (cut-off grade ore, mature tailings, and tailings of the current ore processing) by a reagent complex containing sodium cyanide solution and hydrogen peroxide to enhance the gold recovery …
The dissolution behaviors of various minerals in the tellurium–bismuth ore during oxidic–acidic leaching were investigated systematically in this work. The Te–Bi phase in the ore distributes in network shape, triangular shape, tree shape, strip shape, bulk shape, sparse granule, flake shape, crescent, etc., which are closely intercalated with …
Bismuth can substitute for Pb in galena and Bi-rich galena is a major Bi ore. Bismuth alloys with gold to form maldonite at temperatures < 373 °C, thereby acting as a Au collector in felsic melts, particularly under reduced conditions. ... 2016) or the leaching of Bi from felsic arc rocks (Dekov and Savelli, 2004). The high bulk Bi content ...
The mine was worked intermittently between 1890 -1912, mainly from underground operations with gold the principal metal mined from 1890-1901, with the ore values of gold (1-4 oz/ton) and Bismuth (~ 10%). The principal gangue minerals were magnetite and calcite. Bismuth was the main metal mined from 1901: the principal …
A simple and efficient method was proposed to selectively separate and recover tellurium and bismuth in an acidic leaching solution of tellurium−bismuth ore by Na 2 SO 3 and Fe powder. Then, the selective ... Finally, cyclic leaching of tellurium−bismuth ore was adopted to enrich Te(IV) and Bi(III) concentrations and …
Bismuth leaching efficiency increased from 37% to 92% when H 2 SO 4 concentration in the leaching medium increased from 25 ... A. Sandstrom, J.E. Sundkvist, Method for the treatment of bismuth containing sulfide ores or concentrates of such ore, U.S. Patent 5,961,940, 1999. Google Scholar [11] Ya Chen, T. Liao, G. Li, B. Chen, X. Shi.
The optimum leaching conditions of bismuth were obtained at a temperature range from 323 K to 333 K for a leaching time of 2 h with initial hydrochloric acid concentration of 5 mol/L and liquid-to-solid ratio of 5.0. The bismuth leaching rate reached 98.25% and the Mn leaching rate was 22.06%, which can be further recovered.
In this paper, methanesulfonic acid (MSA) was proposed as the reaction medium to extract bismuth from bismuth sulfide concentrate under pressure leaching conditions. It was found that more than 95 ...
A new membrane electrolysis process for bismuth recovery from bismuthinite concentrate was introduced. Under the conditions of temperature 70 °C, acidity 3 mol/L, solid liquid ratio 1:4 and 1.1 times stoichiometry sodium chlorate dosage for 1.5 h oxidation leaching, more than 98.5% bismuth can be leached from bismuthinite concentrate.
